Commit e95d3eb7 authored by Robert Bradshaw's avatar Robert Bradshaw

Implement "from module [c]import *", some more work on sequence indexing.

parent d3e1ddfc
......@@ -1290,12 +1290,10 @@ class IndexNode(ExprNode):
self.base.result_code, self.index.result_code)
def generate_subexpr_evaluation_code(self, code):
# do not evaluate self.py_index in case we don't need it
self.base.generate_evaluation_code(code)
self.index.generate_evaluation_code(code)
def generate_subexpr_disposal_code(self, code):
# if we used self.py_index, it will be disposed of manually
self.base.generate_disposal_code(code)
self.index.generate_disposal_code(code)
......@@ -1344,13 +1342,20 @@ class IndexNode(ExprNode):
def generate_deletion_code(self, code):
self.generate_subexpr_evaluation_code(code)
self.py_index.generate_evaluation_code(code)
code.put_error_if_neg(self.pos,
"PyObject_DelItem(%s, %s)" % (
#if self.type.is_pyobject:
if self.index.type.is_int:
function = "PySequence_DelItem"
index_code = self.index.result_code
else:
function = "PyObject_DelItem"
index_code = self.index.py_result()
code.putln(
"if (%s(%s, %s) < 0) %s" % (
function,
self.base.py_result(),
self.py_index.py_result()))
index_code,
code.error_goto(self.pos)))
self.generate_subexpr_disposal_code(code)
self.py_index.generate_disposal_code(code)
class SliceIndexNode(ExprNode):
......
......@@ -230,6 +230,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
self.generate_typeobj_definitions(env, code)
self.generate_method_table(env, code)
self.generate_filename_init_prototype(code)
if env.has_import_star:
self.generate_import_star(env, code)
self.generate_module_init_func(modules[:-1], env, code)
code.mark_pos(None)
self.generate_module_cleanup_func(env, code)
......@@ -1430,6 +1432,66 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
code.putln("");
code.putln("static void %s(void); /*proto*/" % Naming.fileinit_cname)
def generate_import_star(self, env, code):
code.putln()
code.putln("char* %s_type_names[] = {" % Naming.import_star)
for name, entry in env.entries.items():
if entry.is_type:
code.putln('"%s",' % name)
code.putln("0")
code.putln("};")
code.putln()
code.putln("static int %s(PyObject *o, PyObject* py_name, char *name) {" % Naming.import_star_set)
code.putln("char** type_name = %s_type_names;" % Naming.import_star)
code.putln("while (*type_name) {")
code.putln("if (!strcmp(name, *type_name)) {")
code.putln('PyErr_Format(PyExc_TypeError, "Cannot overwrite C type %s", name);')
code.putln('goto bad;')
code.putln("}")
code.putln("type_name++;")
code.putln("}")
old_error_label = code.new_error_label()
code.putln("if (0);") # so the first one can be "else if"
for name, entry in env.entries.items():
if entry.is_cglobal and entry.used:
code.putln('else if (!strcmp(name, "%s")) {' % name)
if entry.type.is_pyobject:
if entry.type.is_extension_type or entry.type.is_builtin_type:
code.putln("if (!(%s)) %s;" % (
entry.type.type_test_code("o"),
code.error_goto(entry.pos)))
code.put_var_decref(entry)
code.putln("%s = %s;" % (
entry.cname,
PyrexTypes.typecast(entry.type, py_object_type, "o")))
elif entry.type.from_py_function:
rhs = "%s(o)" % entry.type.from_py_function
if entry.type.is_enum:
rhs = typecast(entry.type, c_long_type, rhs)
code.putln("%s = %s; if (%s) %s;" % (
entry.cname,
rhs,
entry.type.error_condition(entry.cname),
code.error_goto(entry.pos)))
code.putln("Py_DECREF(o);")
else:
code.putln('PyErr_Format(PyExc_TypeError, "Cannot convert Python object %s to %s");' % (name, entry.type))
code.putln(code.error_goto(entry.pos))
code.putln("}")
code.putln("else {")
code.putln("if (PyObject_SetAttr(%s, py_name, o) < 0) goto bad;" % Naming.module_cname)
code.putln("}")
code.putln("return 0;")
code.put_label(code.error_label)
# This helps locate the offending name.
code.putln('__Pyx_AddTraceback("%s");' % self.full_module_name);
code.error_label = old_error_label
code.putln("bad:")
code.putln("Py_DECREF(o);")
code.putln("return -1;")
code.putln("}")
code.putln(import_star_utility_code)
def generate_module_init_func(self, imported_modules, env, code):
code.putln("")
header = "PyMODINIT_FUNC init%s(void)" % env.module_name
......@@ -2019,3 +2081,94 @@ bad:
return ret;
}
"""]
import_star_utility_code = """
/* import_all_from is an unexposed function from ceval.c */
static int
__Pyx_import_all_from(PyObject *locals, PyObject *v)
{
PyObject *all = PyObject_GetAttrString(v, "__all__");
PyObject *dict, *name, *value;
int skip_leading_underscores = 0;
int pos, err;
if (all == NULL) {
if (!PyErr_ExceptionMatches(PyExc_AttributeError))
return -1; /* Unexpected error */
PyErr_Clear();
dict = PyObject_GetAttrString(v, "__dict__");
if (dict == NULL) {
if (!PyErr_ExceptionMatches(PyExc_AttributeError))
return -1;
PyErr_SetString(PyExc_ImportError,
"from-import-* object has no __dict__ and no __all__");
return -1;
}
all = PyMapping_Keys(dict);
Py_DECREF(dict);
if (all == NULL)
return -1;
skip_leading_underscores = 1;
}
for (pos = 0, err = 0; ; pos++) {
name = PySequence_GetItem(all, pos);
if (name == NULL) {
if (!PyErr_ExceptionMatches(PyExc_IndexError))
err = -1;
else
PyErr_Clear();
break;
}
if (skip_leading_underscores &&
PyString_Check(name) &&
PyString_AS_STRING(name)[0] == '_')
{
Py_DECREF(name);
continue;
}
value = PyObject_GetAttr(v, name);
if (value == NULL)
err = -1;
else if (PyDict_CheckExact(locals))
err = PyDict_SetItem(locals, name, value);
else
err = PyObject_SetItem(locals, name, value);
Py_DECREF(name);
Py_XDECREF(value);
if (err != 0)
break;
}
Py_DECREF(all);
return err;
}
static int %s(PyObject* m) {
int i;
int ret = -1;
PyObject *locals = 0;
PyObject *list = 0;
PyObject *name;
PyObject *item;
locals = PyDict_New(); if (!locals) goto bad;
if (__Pyx_import_all_from(locals, m) < 0) goto bad;
list = PyDict_Items(locals); if (!list) goto bad;
for(i=0; i<PyList_GET_SIZE(list); i++) {
name = PyTuple_GET_ITEM(PyList_GET_ITEM(list, i), 0);
item = PyTuple_GET_ITEM(PyList_GET_ITEM(list, i), 1);
if (%s(item, name, PyString_AsString(name)) < 0) goto bad;
}
ret = 0;
bad:
Py_XDECREF(locals);
Py_XDECREF(list);
return ret;
}
""" % ( Naming.import_star, Naming.import_star_set )
......@@ -67,6 +67,8 @@ print_function_kwargs = pyrex_prefix + "print_kwargs"
cleanup_cname = pyrex_prefix + "module_cleanup"
optional_args_cname = pyrex_prefix + "optional_args"
no_opt_args = pyrex_prefix + "no_opt_args"
import_star = pyrex_prefix + "import_star"
import_star_set = pyrex_prefix + "import_star_set"
line_c_macro = "__LINE__"
......
......@@ -3665,6 +3665,10 @@ class FromCImportStatNode(StatNode):
module_scope = env.find_module(self.module_name, self.pos)
env.add_imported_module(module_scope)
for pos, name, as_name in self.imported_names:
if name == "*":
for local_name, entry in module_scope.entries.items():
env.add_imported_entry(local_name, entry, pos)
else:
entry = module_scope.find(name, pos)
if entry:
local_name = as_name or name
......@@ -3684,11 +3688,20 @@ class FromImportStatNode(StatNode):
# items [(string, NameNode)]
# interned_items [(string, NameNode)]
# item PyTempNode used internally
# import_star boolean used internally
child_attrs = ["module"]
import_star = 0
def analyse_declarations(self, env):
for _, target in self.items:
for name, target in self.items:
if name == "*":
if not env.is_module_scope:
error(self.pos, "import * only allowed at module level")
return
env.has_import_star = 1
self.import_star = 1
else:
target.analyse_target_declaration(env)
def analyse_expressions(self, env):
......@@ -3698,6 +3711,12 @@ class FromImportStatNode(StatNode):
self.item.allocate_temp(env)
self.interned_items = []
for name, target in self.items:
if name == '*':
for _, entry in env.entries.items():
if not entry.is_type and entry.type.is_extension_type:
env.use_utility_code(ExprNodes.type_test_utility_code)
break
else:
self.interned_items.append(
(env.intern_identifier(name), target))
target.analyse_target_expression(env, None)
......@@ -3707,6 +3726,12 @@ class FromImportStatNode(StatNode):
def generate_execution_code(self, code):
self.module.generate_evaluation_code(code)
if self.import_star:
code.putln(
'if (%s(%s) < 0) %s;' % (
Naming.import_star,
self.module.py_result(),
code.error_goto(self.pos)))
for cname, target in self.interned_items:
code.putln(
'%s = PyObject_GetAttr(%s, %s); %s' % (
......
......@@ -944,7 +944,10 @@ def p_from_import_statement(s, first_statement = 0):
else:
s.error("Expected 'import' or 'cimport'")
if s.sy == '*':
s.error("'import *' not supported")
# s.error("'import *' not supported")
imported_names = [(s.position(), "*", None)]
s.next()
else:
imported_names = [p_imported_name(s)]
while s.sy == ',':
s.next()
......
......@@ -693,8 +693,10 @@ class ModuleScope(Scope):
# interned_nums [int/long] Interned numeric constants
# all_pystring_entries [Entry] Python string consts from all scopes
# types_imported {PyrexType : 1} Set of types for which import code generated
# has_import_star boolean Module contains import *
is_module_scope = 1
has_import_star = 0
def __init__(self, name, parent_module, context):
self.parent_module = parent_module
......@@ -734,7 +736,10 @@ class ModuleScope(Scope):
def declare_builtin(self, name, pos):
if not hasattr(__builtin__, name):
if self.outer_scope is not None:
if self.has_import_star:
entry = self.declare_var(name, py_object_type, pos)
return entry
elif self.outer_scope is not None:
return self.outer_scope.declare_builtin(name, pos)
else:
error(pos, "undeclared name not builtin: %s"%name)
......
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